Anderer Ressourcentyp

Siemens Stiftung

Optics - The physics of light

Information sheet:
Starting from the definition of light, light is described concisely in its various forms as a ray, as a wave, and as radiant energy.

Introduction to optics.

Information and ideas:
Intended as preliminary information for students as well as for teachers.

Bild

Siemens Stiftung

Sound diffraction

Graphic:
Diffraction is a typical feature of sound waves when they meet an obstacle.

The diffraction of sound waves is a physical mechanism which ensures the entry of sound waves into acoustic shadows.
That means the sound is audible in areas which are cut off from the direct sound incidence, such as behind obstacles.

Information and ideas:
Diffraction of light can be proved when a parallel ray beam of monochrome light is directed at a narrow opening. A screen set up behind the opening gives us a diffraction figure (bright and dark stripes that lose intensity the further outwards they are). With sound, a direct reference to the students' everyday world is even easier: Why can you hear noise from a street in front of a building even when you are behind the building?
Further information about this graphic is provided as an information sheet on the media portal of the Siemens Stiftung.

Relevant for teaching:
Sound/acoustics: parameters
Vibrations and waves

Medientypen

Bild

Lernalter

13-18

Schlüsselwörter

Chart Optics Sound Wave (physics)

Sprachen

Englisch

Anderer Ressourcentyp

Siemens Stiftung

Symmetry - what is that?

Information sheet:
The types of symmetry, examples from everyday life, important features of symmetry, and basic technical terms on the topic are explained in simple words.

Comments on the origin of the word and also on the meaning of symmetry in the wider sense of the word (beauty, usefulness, fairness) introduce the topic. This is followed by an overview of the three types of symmetry (reflection, rotational, and translational symmetry).

Bildungsbereiche

Elementarbildung

Fach- und Sachgebiete

Mathematik

Anderer Ressourcentyp, Arbeitsblatt

Siemens Stiftung

Arithmetic with a mirror

Interactive arithmetic exercise:
Five coins are arranged on a table. How must the pocket mirror be placed to double the number of coins? (And four other exercises.)

Three possible positions for the pocket mirror are given in each case. Click the button with a check mark to show the correct mirror position. At the same time, a photo showing the correct answer is displayed.


Bild

Siemens Stiftung

Lens and imaging equation

Schematic diagram:
The light rays emanating from the object must be collected through a lens to form the points of an image. The imaging equation describes the applicable laws.

At least two of the following rays are needed to construct the image:
· Ray from the object parallel to the optical axis (parallel ray)
· Ray from the object through the focal point of the lens (focal ray)
· Ray from the object through the central point of the lens (central point ray).

The central point ray passes through the lens without changing direction. The parallel ray passes through the focal point on the other side of the lens, and the focal ray becomes the parallel ray.

Note: The imaging equation is also frequently known as the "lens equation."

Information and ideas:
What are lenses needed for?

Medientypen

Bild

Lernalter

13-18

Schlüsselwörter

Light Optics

Sprachen

Englisch

Anderer Ressourcentyp

Siemens Stiftung

Symmetry

Content package for interactive whiteboards:
Individual media related to symmetry are compiled here in a meaningful way for teaching using an interactive whiteboard.

All media in the content package for the interactive whiteboard are included in this self-extracting file. The content package can be started simply by clicking the ".exe" file.

The content package consists of the following media:
· 1 graphic as an image for discussion to introduce the topic (cover image)
· 4 photos or photo collages that make symmetry visible in everyday life.
· 2 interactive graphics (Find axes of symmetry, How rotational symmetry occurs)
· 2 interactive exercises (Find the asymmetrical object, Arithmetic with a mirror)
· 3 sets of experimentation/craft instructions (reflection, translational, and rotational symmetry)
· 2 information sheets (What is symmetry?, We build a symmetrical castle)
· 2 worksheets with answer sheets (Translational symmetry, Symmetry exercises with a geoboard)
· 1 link list

Information and ideas:
The media in the content package for interactive whiteboards are also available as individual media on the media portal of the Siemens Stiftung.


Anderer Ressourcentyp

Siemens Stiftung

B5 We build a thermal solar plant (link list)

Link list:
Further information on the experiment "B5 We build a thermal solar plant - with a magnifying glass and mirror".

The links can be used for preparing or for further study of experiments from Experimento | 10+.

Übung

Siemens Stiftung

Which of the objects does not have reflection symmetry?

Multiple-choice test:
From four photos or illustrations of everyday objects, the students are to pick out the object that does not have reflection symmetry.

The students need to make a visual judgment: Symmetrical designs are incorporated into many objects, but they are not always rendered perfectly. For example, a pretzel actually has reflection symmetry, but some pretzels are a bit crooked.

Bildungsbereiche

Elementarbildung

Fach- und Sachgebiete

Mathematik

Medientypen

Übung

Lernalter

6-10

Schlüsselwörter

Axial symmetry Geometric figure Geometry Optics

Sprachen

Englisch

Bild

Siemens Stiftung

Symmetry is everywhere

Photo collage:
Symmetrical objects such as those seen all over at home and outdoors.

Symmetry is an everyday phenomenon that the students can recognize in many things in their environment if they only look more closely. Also suitable as an incentive for them to explore on their own and look for symmetry.

Information and ideas:
The jumping jack shown is not purely symmetrical with respect to reflection, but at first glance the students might think it is. The image can be used as a stimulus to motivate the students to design their own jumping jacks with reflection symmetry.

Bildungsbereiche

Elementarbildung

Fach- und Sachgebiete

Mathematik

Medientypen

Bild

Lernalter

6-10

Schlüsselwörter

Axial symmetry Geometric figure Geometry Optics

Sprachen

Englisch

Anderer Ressourcentyp

Siemens Stiftung

Link list for the "Symmetry" interactive whiteboard content

Link list:
Interesting and entertaining Web links on the topic of symmetry.

Additional information on the topic of symmetry for class (for example, craft instructions, interactive games) or as background information for teachers.